Chair.



` 0. L. OSTENDORF.

CHAIR.

APPLIOATION FILED APR.24,1912.

Patented Nov. 26,

2 SHEETS-SHEET 1.

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v 0. L.` OSTENDORF.

CHAIR.

APPLICATION FILED APR. 2A, 1912.

Patented. NOV. 26|, 1912.

2 SHEETS-SHEET 2.

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enana Specification of ILetters Paten-t. Patented Nov.' 26, 1912,Application ined April a4, 1912.v Serial N'o. 692,880.

To all wholm it may concern: .Be it known that I,A O'r'ro L;.OS'rENDoRF, ofvRochester, in the count-y of Monroe and Sta-te of NewYork. have invented certain new and useful Improvements in Chairs; and Ido hereby declare the following to be a full, clear, and exactdescription of the same, reference beingchad to the accompanyingdrawings, forming a partv of this specification, and to thereference-numerals marked thereon.

My invention relates to improvements .in chairs, with particularreference to reclining chairs of the type embodying a. swinginglymovable back, and it has for its primaryolo-l .ject to provide animproved construction and arrangement of parts for-effectingverf ticalmovement of the rear portion of the seat relatively tothe back, whenlthe back is lowered, and vice versa.

A further object of my invention consists in the provision of novelmeans for supporting the seat on the chair frame. and in connecting theseat with the back in ysuch'a manner as to obtain the necessary relativemovement betweenthem. .so'as to accommo` date all positie-ns of the bodyof a person in the chair.

To these and 'other ends the invention consists in certain improvementsand combinay tions of parts all as will be hereinafter more fullydescribed, the novel features being pointed-out in the claims at the endof the specication.

Figure l is a vertical sectional view of a chair constructed-inaccordance with 4a preferred embodiment'o'fmy invention. FigQg. 1s aview in elevat1on,iw1th t-he seat and back cushions removed. Fig. B'is avertical sectional view taken in the same plane as Fig.

' l, the back being in loweredposition, and

the seat in correspondingly raised position. Fig. 4 is a detailsectional view, showing the connection between the back frame and theseat frame. F 5 is a detail view in elevation, of the rack by which theback frame may be adjusted vertically.. and Fig. (i is a view inperspective of the hinge for connecting the seat frame to the baseframe.

Similar reference characters throughoutthe several figures indicate thesame parts.

In the present embodiment of the invention, 1 designates the base frame,2 is the seat frame and 3 is the back frame, while 4;

and 5 designate the cushions or upholstery Theseat frame is pivotallysupported at the front ofthe Ybase frame, and includesA '-side. pieces1,0 which are provided at their Y(rea-r ends with reversely curvedportions to 4whichare attached correspondingly curved metal wear plates11. The curved portions of the side pieces rest lon the anti-frictiondevices 9, and the uppermost portions of the curved surfaces constituteseats for the antifriction devices 9 when the chair parts are in theirnormal position as shown in Fig. l, while the forwardly extendingportions of the curved surfaces are so shaped that in Y being due to theformation ofthe cam sur- .faees with which theanti-friction devices 9engage, as shown in Fig. 3. The parts are V'held 'in normal position bymeans of a tension spring 12 connecting the seatframe and the baseframes respectively, but'it will be understood that the resistanceoffered by the spring is such that it may readily be overcome bypressure against the chair back. The tension of spring l2 may beincreased by raising the back frame from'the position shown in thedrawings, and supporting it in one of the upper pairs of notches 7. Thiseffects a raising also of the seat frame, thus creating a greatertension on the spring 1.2. This adjustment is desirable for persons ofdifferent weight so that the .resistance offered will be proper under.all conditions,'to insure comfort, and it will he understood that whileI have shown three possible adjustments for the back frame, I may employa structurel enabling a greater or smaller their cooperation with theprojections on number of adjustments Without departing from theessential idea-of my improvement.

' The seat frame 2 is pivotally and removably attached at the front ofthe base frame, and to this end I attach to the base frame the hingeleaves 13 which are preferably provided With rearwardly upturnedportions 14 `and are slotted at 15. The seat frame carries lcooperatinghinge leaves 16,

which have angular lugs 1 7 adapted toen-y gage'in the slotted portions15 of the leaves 13. This forms a simple and extremely efficienthinge,'permitting ready movement of the seat frame about its pivotalaxis, and enables the seat frame to be removed from -the base 4frame bylowering it at thel rear,

. after the back frame is removed. It Will be understood that the Weightof the parts, together with the spring 12, holds theback frame in itsnormal position, in Which it supports the seat frame, and preventsremoval ofthe latter. To take the chair apart, the spring 12 is firstremoved, and the back can then be lifted out, leaving the seat free tobe detached fromits hinge supports.

I claim as my invention:

. 1. In a chair, the combination With a base frame, of a seat framepivotally supported at the front of the base frame, the seat frameincluding side pieces each having a reversely curved portion formedthereon, a back frame -pivotally supported on thev base frame, and

projections on the back frame having engagement with the reverselycurved portions of theside pieces.

2. In a chair, the combination Wit-h a bas'e frame, of a seat framepivotally supported at the ,front of the base frame, the seat frameincluding side pieces each having a reversely curved portion formedthereon, a

back frame pivotally supported on the base frame, and anti-frictiondevices carried by the back-frame and engaging said curved portionsofthe side pieces.

3. In a chair, the combination with a base frame,of a seat framepivotally supported at the front of the base frame, the seat frameincluding side pieces each having a curved portion formed thereon, metalWear plates secured to said curved portions and back frame and engagingsaid curved portions of the side pieces, and a spring connecting thebase frame and the rear partof the seat frame. A

5. In a chair, the combination With a base frame, of a seat framepivotally supported at the front of the base frame, the seat frameincluding side pieces each having a cam surface at the rear thereof ofextended, gradual curvature, a back-frame pivotally supported on thebase frame, and projections on the back frame having engagement withsaid cam surfaces. OTTO IJ. OSTENDORF.

Witnesses:

JESSE B. WILLHAM, R. I. LENIHAN.

